CN1320545C - Optical recording device, optical reproducing device, method for recording optical recording medium, and method for reproducing optical recording medium - Google Patents

Optical recording device, optical reproducing device, method for recording optical recording medium, and method for reproducing optical recording medium Download PDF

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Publication number
CN1320545C
CN1320545C CNB02804116XA CN02804116A CN1320545C CN 1320545 C CN1320545 C CN 1320545C CN B02804116X A CNB02804116X A CN B02804116XA CN 02804116 A CN02804116 A CN 02804116A CN 1320545 C CN1320545 C CN 1320545C
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China
Prior art keywords
signal
swinging signal
accuracy
swinging
jitter
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Expired - Fee Related
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CNB02804116XA
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Chinese (zh)
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CN1488140A (en
Inventor
增田善裕
佐佐木敬
高濑经光
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Sony Corp
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Sony Corp
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Publication of CN1488140A publication Critical patent/CN1488140A/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215—Recordable discs
    • G11B2220/216—Rewritable discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215—Recordable discs
    • G11B2220/218—Write-once discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • G11B2220/2575—DVD-RAMs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Rotational Drive Of Disk (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

When performing writing and/or reading of information to/from an optical disk provided with a wobble including time axis information, an occurrence of a reading error of the time axis information from the wobble is suppressed so that disabled reading of information from the optical disk and an occurrence of a writing error can be prevented. Evaluated parameters such as a CRC error rate of an ATIP signal, an FMDT jitter amount and a phase error between an ATIP synchronization signal and a frame synchronization signal of writing data are evaluated based on a range of set values. When the evaluated parameter is deviated from the range of set values, writing and reading speeds are changed, thereby increasing the reading accuracy of the wobble signal.

Description

Optical recorder, optical reproducing apparatus, recording medium recording method and recording medium reproducing method
Technical field
The present invention relates to a kind of device to optical recording media such as CD and light-card execution information record and/or reproduction.More particularly, it relates to a kind of optical recorder, recording medium recording method, optical reproducing apparatus and recording medium reproducing method, and they use the optical recording media with the swing that comprises address information.
Background technology
As the CD of permission information record, there be the CD-R (CD-can write down) and the CD-RW (CD-can rewrite) of CD standard, and the DVD-R of dvd standard, DVD-RW, DVD+R, DVD+RW and DVD-RAM.For example, the groove of cutting sine wave shape etc. in CD-RW dish substrate.Recording layer corresponding to groove partly is a track record.The serpentine of groove is called swing.FM modulation positions information be the timeline information of absolute position on the indicating panel as ATIP (Absolute Time in Pre-groove, the absolute time in the pre-fluting) signal record in swing.
When CD standard speed when rotation for example at a predetermined velocity,, its frequency writes down atip signal so that being the mode of 22.05kHz ± 1kHz.A sector of atip signal is corresponding with a data sector (2352 byte) of record data.When record data are write down, the data sector of atip signal sector and record data is carried out synchronous in executive logging.
Fig. 1 illustrates the frame structure of atip signal.One frame has 42 bits, comprises 4 bit SYNC (synchronizing information), 24 bit timeline informations (minute, second, frame number are 8 bits) and as the 14 bit CRC (Cyclic Redundancy Code, Cyclic Redundancy Code) of error-detecging code.CD-RW record and transcriber are according to the Spin Control of the SYNC execution dish of atip signal, i.e. main axle servo.
In this record and transcriber, the cut on interference element such as the recording surface, stain and finger mark, mechanical property change the reproduction of (excentricity, center of gravity excentricity, crooked and swing), electrical specification variation (worsening S/N and reflectance varies) and extraneous vibration and the above-mentioned atip signal of vibration influence.Particularly in recent years CD is carried out the speed significantly raising of data recording and reproduction.Interference element is increasing to the influence of reproducing atip signal.When the reconstruction error of atip signal takes place when, the main axle servo instability.Thereby the deterioration of reproducing characteristic (seeking bit time and transfer rate) and recording characteristic takes place.Under worst case, existence can not be write down and the problem of reproduction and occurrence record mistake.
Summary of the invention
The present invention proposes under said circumstances, and the purpose of this invention is to provide a kind of optical recorder, optical reproducing apparatus, recording medium recording method and recording medium reproducing method, they can suppress to take place from swinging the error of recovery time axis information, can not be from optical recording media information reproduction and occurrence record mistake thereby prevent.
A kind of optical recorder of the present invention comprises: the swinging signal production part is used for producing swinging signal according to the electric signal from light picker output; Evaluation means is used to assess the accuracy by the swinging signal of swinging signal production part generation; And control assembly, be used under situation the CD executive logging, when the swinging signal accuracy by the evaluation means assessment departs from preset range, allow to carry out the control of interruption logging operation.In addition, it also comprises the jitter measurement parts, is used to measure the amount of jitter of swinging signal.Evaluation means is assessed the accuracy of swinging signal at least according to the swinging signal amount of jitter of being measured by the jitter measurement parts.In addition, error-detecging code is added in the swinging signal.The decoding parts use the error-detecging code error detection when the timeline information that produces from swinging signal is decoded, and evaluation means is assessed the accuracy of swinging signal at least according to the error rate of error-detecting.In addition, add the synchronizing signal that is used for carrying out frame synchronization to swinging signal with record data.The phase error measurement component is provided, is used to measure the phase error between the synchronizing signal of this synchronizing signal and record data, and evaluation means is at least according to the phase error of being measured by the phase error measurement component, the accuracy of assessment swinging signal.In addition, under the situation of executive logging, when judging that the swinging signal accuracy of being assessed by evaluation means is lower than the following of preset range and prescribes a time limit, control assembly carries out the interruption logging operation, reduce writing speed and restart the control of recording operation, and when judging that the swinging signal accuracy is higher than going up in limited time of predetermined accuracy scope, carry out the interruption logging operation, improve writing speed and restart the control of recording operation.
In addition, a kind of optical reproducing apparatus of the present invention comprises: the swinging signal production part is used for producing swinging signal according to the electric signal from light picker output; Evaluation means is used to assess the accuracy by the swinging signal of swinging signal production part generation; And control assembly, be used for carrying out under the situation of optical disc replay, when the swinging signal accuracy by the evaluation means assessment departs from the predetermined accuracy scope, change the reproduction speed of under CLV or CAV condition, setting.In addition, it also comprises the jitter measurement parts, is used to measure the amount of jitter of swinging signal.Evaluation means is assessed the accuracy of swinging signal at least according to the swinging signal amount of jitter of being measured by the jitter measurement parts.In addition, error-detecging code is added in the swinging signal.The decoding parts use the error-detecging code error detection when the timeline information that produces from swinging signal is decoded, and evaluation means is assessed the accuracy of swinging signal at least according to the error rate of error-detecting.In addition, add the synchronizing signal that is used for carrying out frame synchronization to swinging signal with record data.The phase error measurement component is provided, is used to measure the phase error between the synchronizing signal of this synchronizing signal and record data, and evaluation means is at least according to the phase error of being measured by the phase error measurement component, the accuracy of assessment swinging signal.
In addition, a kind of recording medium recording method of the present invention comprises the steps: to produce swinging signal according to the electric signal from light picker output; The accuracy of assessment swinging signal; And when working as the swinging signal accuracy of being assessed and departing from preset range, interrupt recording operation to recording medium.
In addition, a kind of recording medium reproducing method of the present invention comprises the steps: to produce swinging signal according to the electric signal from light picker output; The accuracy of assessment swinging signal; And when working as the swinging signal accuracy of being assessed and departing from the predetermined accuracy scope, change the reproduction speed of under CLV or CAV condition, setting.
In the present invention, according to the amount of jitter of swinging signal, add the error-detecting result of the error-detecging code in the swinging signal to or add synchronizing signal in the swinging signal to and the synchronizing signal of record data between phase error, the accuracy of assessment swinging signal.When assessment result departed from preset range, the interruption logging operation restarted recording operation then after changing writing speed in record.In addition, when reproducing, change the reproduction speed of under the condition of CLV or CAV, setting.Change the reproduction accuracy that record and reproduction speed allow to improve swinging signal, can not be thereby prevent from optical recording media information reproduction and occurrence record mistake.
Description of drawings
Fig. 1 is the frame assumption diagram of atip signal;
Fig. 2 is the block diagram of optical recorder according to an embodiment of the invention;
Fig. 3 is the control flow chart in the optical recorder of Fig. 1;
Fig. 4 A is the oscillogram of the ATIP eye pattern (eyepattern), FMDT signal and the FMCK signal that swinging signal are shown respectively, therefrom produce to 4D; And
Fig. 5 is the graph of a relation between the frame synchronizing signal of the synchronizing signal of ATIP and record data.
Embodiment
With reference to the accompanying drawings embodiments of the invention are described in more detail.Fig. 2 illustrates the structure of the optical recorder that is used to use optical recording media execution information record and/or reproduces.
Optical recorder 1 is to be used for the device of disc shape media 100 as CD-RW execution information record and reproduction.Medium 100 is assemblied in the Spindle Motor 2 to be rotated by it.Spindle Motor 2 rotates according to the driving of spindle driver 3 under the control of system control component 11.
Light picker 4 comprises: semiconductor laser 5 is used to launch light beam; Collimation lens 22 is used for and will be converted to directional light from semiconductor laser 5 emitted light beams; Beam splitter 6 is used for the light path of light beam is carried out branch; Object lens 7 are used for the light by beam splitter 6 is focused on, it is shone on the medium 100; Condenser lens 23 is used for the back light that is reflected by medium 100 and reflected by beam splitter 6 is focused on; And photodetector 24, be used to receive the back light that focuses on by condenser lens 23, so that it is converted to electric signal.
Laser driver 8 is under the control of system control component 11, and the semiconductor laser 5 of control light picker 4 is so that the optimal power that its output power is respectively record, reproduces and wipes.
The object lens 7 of light picker 4 are supported by twin shaft driver (not shown), thereby it can be moved on biaxially oriented, wherein, biaxially oriented be meant the medium 100 that is assemblied in the Spindle Motor 2 radially and direction approaching and away from the recording surface of medium 100.Servocontrol parts 10 are controlled the twin shaft drivers so that object lens 7 can move on biaxially oriented, thereby carry out focus servo and tracking servo in light picker 4.
In addition, the footpath of the medium 100 of light picker 4 in being assemblied in Spindle Motor 2 is upwards moved, thus the required track record by the access mechanism (not shown) access medium 100 of under the control of system control component 11, operating.
The output of the photodetector 24 of light picker 4 offers RF Signal Processing Element 12.RF Signal Processing Element 12 produces RF reproducing signal, focus error signal, tracking error signal and swinging signal according to the voltage signal that provides from photodetector 24.The RF reproducing signal that is produced by RF Signal Processing Element 12 offers digitizing/clock generating parts 13.
Digitizing/13 pairs of RF reproducing signal combine digital processing that provide from RF Signal Processing Element 12 of clock generating parts being converted into numerical data, and offers data processor 14 with numerical data.Digitizing/clock generating parts 13 also produce and the numerical data clock signal synchronous, and the clock signal that is produced is offered data processor 14 with numerical data.
Under the control of system control component 11,14 pairs of data processors carry out the EFM demodulation from the numerical data that digitizing/clock generating parts 13 provide, and use CIRC (CroSSInterleave Reed-Solomon Code, cross interleave Reed-Solomon code) to carry out deinterleaving processing and correction process.Then, data processor 14 uses ECC (Error CorrectingCode, error correcting code) to carry out scramble process and correction process to digital data.
In data processor 14 through the data storage after the correction process memory buffer 15 as DRAM in, then, it offers host computer as the reproduction data by interface 16.
When host computer provides record data by interface 16, store under the situation of memory buffer 15 as DRAM at record data temporarily, data processor 14 calls over record data from buffering storer 15, and it is encoded to the predetermined sector form, adds the ECC that is used for error correction to record data then.In addition, 14 pairs of record data of data processor are carried out CIRC encoding process and EFM modulation treatment, to produce tracer signal.Then, tracer signal is offered laser driver 8.
On the other hand, will offer servocontrol parts 10 by focus error signal and the tracking error signal that RF Signal Processing Element 12 produces, and swinging signal will be offered atip decoder 19.
Atip decoder 19 is carried out CRC check and decoding processing to the swinging signal that provides from RF Signal Processing Element 12 under the control of system control component 11, to produce the atip signal of express time axis information.The atip signal that is produced by atip decoder 19 offers system control component 11, and offers jitter measurement parts 20 and phase error measurement component 21.The crc error rate of the atip signal that produces by CRC check also offers system control component 11.
In addition, when carrying out the accessing operation of light picker 4, system control component 11 is according to atip signal control access mechanism (not shown), to allow the required track record of light picker 4 visits.
Jitter measurement parts 20 are measured the shake of the signal (FMDT signal) that is obtained by atip decoder 19, so that its measured value is offered system control component 11.
Phase error measurement component 21 is measured by the phase error (SYNC phase error) between the frame synchronizing signal of the frame synchronizing signal of the ATIP of atip decoder 19 decodings and record data, so that its measured value is offered system control component 11.
The operation of system control component 11 control overall optical pen recorders 1.System control component 11 uses SRAM 17 as the workspace also according to the operating control procedure that is stored among the ROM 27, the operation of each parts of control optical recorder 1.
Range of set value separately to the crc error rate of major general's atip signal, FMDT shake and SYNC phase error is set among the EEPROM 28.
The crc error rates that 11 pairs of system control components are detected by atip decoder 19, the FMDT amount of jitter of measuring by jitter measurement parts 20 and carry out statistical treatment such as simple average or moving average by each evaluate parameter of SYNC phase error that phase error measurement component 21 obtains, and its result and range of set value are compared.For example, when having any to depart from range of set value in three evaluate parameters, the control that system control component 11 is for example also carried out interruption logging, change (reduce or improve) writing speed and restarted to write down according to predetermined decision condition during writing down.System control component 11 is also carried out the control that changes (reduce or improve) reproduction speed at reproduction period.In addition, can also be provided with and change the range limit that changes writing speed and reproduction speed and lower limit.
Next step will describe the operation that records information to medium 100 by optical recorder 1 of the present invention.
When recording information to medium 100, handle below at first carrying out, thereby optical recorder 1 is entered to record information to " ready " state of medium 100.
Medium 100 is assemblied in the Spindle Motor 2.Spindle driver 3 under the control of system control component 11 drive shaft motor 2 so that medium 100 rotation.In addition, laser driver 8 drives the semiconductor laser 5 of light picker 4 under the control of system control component 11, to allow the light beam of semiconductor laser 5 emission predetermined power.
Be converted to directional light from semiconductor laser 5 emitted light beams by collimation lens 22, then, the object lens 7 that it focuses on it with arrival by beam splitter 6.Light beam irradiates is to the medium 100 by Spindle Motor 2 rotary manipulations.The light beam that shines on the medium 100 is reflected into the back light that comprises wobble component by medium 100.Back light receives to arrive the beam splitter 6 that it is reflected, to be focused on to enter photodetector 24 by condenser lens 23 then by object lens 7.24 pairs of photodetectors receive back light and carry out opto-electronic conversion and current-voltage conversion, to produce the voltage signal corresponding to back light.The voltage signal that is produced by photodetector 24 offers RF Signal Processing Element 12.
RF Signal Processing Element 12 produces swinging signal, and provides it to atip decoder 19 according to the voltage signal that provides from photodetector 24.Atip decoder 19 is carried out CRC check and decoding processing to swinging signal under the control of system control component 11, produce the atip signal of expression SYNC and timeline information, then it is offered system control component 11.
System control component 11 is controlled the driving of spindle driver 3 according to atip signal, thereby makes for example speed rotation to set under CLV or CAV condition of medium 100 that is assemblied in the Spindle Motor 2.
According to above-mentioned a series of processing, optical recorder 1 enters " ready " state that can carry out the information recording operation on medium 100.
After this, when data processor 14 during from host computer receiving record data, data processor 14 is encoded to the predetermined sector form with record data, carries out the processing of adding the ECC that is used for error correction then, CIRC encoding process and EFM modulation treatment are to produce tracer signal.Then, data processor 14 offers laser driver 8 with tracer signal.
The semiconductor laser 5 of light picker 4 is provided according to the tracer signal that provides from data processor 14 under the control of system control component 11 laser driver 8.Therefore, semiconductor laser 5 emissions are according to the light beam of the recording power of record data modulation.
Be converted to directional light from semiconductor laser 5 emitted light beams by collimation lens 22, then, focus on by object lens 7, thereby shine on the medium 100 by Spindle Motor 2 rotary manipulations by beam splitter 6.The light beam that shines on the medium 100 is emitted as the back light that comprises wobble component by medium 100.Back light is reflected by beam splitter 6 by object lens 7, then, is focused on to enter photodetector 24 by condenser lens 23 and to receive.
24 pairs of photodetectors receive back light and carry out opto-electronic conversion and current-voltage conversion, to produce the voltage signal corresponding to back light.Then, the voltage signal that is produced by photodetector 24 offers RF Signal Processing Element 12.
RF Signal Processing Element 12 produces swinging signal according to the voltage signal that provides from photodetector 24, and it is offered atip decoder 19.Atip decoder 19 is carried out CRC check and decoding processing to swinging signal under the control of system control component 11, produce the atip signal of expression SYNC and timeline information, then it is offered system control component 11.System control component 11 is carried out the control and the main axle servo of access mechanism (not shown) according to atip signal.
Next step will be described by the operation of optical recorder 1 of the present invention from medium 100 information reproductions.
When reproducing order by interface 16 when host computer offers system control component 11, the operation of system control component 11 control access mechanism (not shown), with the footpath of the medium in the being assemblied in Spindle Motor 2 100 mobile light picker 4 that makes progress, thereby can make the required track record of light picker 4 access medium 100.In addition, the operation of system control component 11 control laser drivers 8 with the semiconductor laser 5 of driving light picker 4, thereby is launched light beam from semiconductor laser 5 with reproducing power.
Be converted to directional light from the reconstruction beam of semiconductor laser 5 emissions by collimation lens 22, focus on by object lens 7 by beam splitter 6 then.Then, the reconstruction beam that is focused on by object lens 7 shines on the medium 100 by Spindle Motor 2 rotary manipulations.Form luminous point along the pit array that on medium 100, forms.
Shining reconstruction beam on the medium 100 is emitted as by medium 100 and comprises the back light that records the component of signal of medium 100 as pit array.Back light is reflected by beam splitter 6 by object lens 7, then, is focused on to enter photodetector 24 by condenser lens 23 and to receive.
24 pairs of photodetectors receive back light and carry out opto-electronic conversion and current-voltage conversion, to produce the voltage signal corresponding to back light.Then, the voltage signal that is produced by photodetector 24 offers RF Signal Processing Element 12.
RF Signal Processing Element 12 produces RF reproducing signal, focus error signal, tracking error signal and swinging signal according to the voltage signal that provides from photodetector 24.The focus error signal and the tracking error signal that are produced by RF Signal Processing Element 12 offer servocontrol parts 10.Servocontrol parts 10 drive twin shaft driver (not shown) according to focus error signal and tracking error signal under the control of system control component 11, and carry out focus servo and tracking servo in light picker 4.
In addition, the swinging signal that produces in RF Signal Processing Element 12 offers atip decoder 19.Atip decoder 19 is carried out CRC check and decoding processing to swinging signal under the control of system control component 11, to produce the atip signal of expression SYNC and timeline information.Atip signal offers system control component 11.System control component 11 is carried out the control and the main axle servo of access mechanism (not shown) according to atip signal.
In addition, the RF reproducing signal that is produced by RF Signal Processing Element 12 offers digitizing/clock generating parts 13, and wherein, the combine digital processing is to be converted into numerical data.Then, numerical data offers data processor 14.
The correction process of CIRC etc. is handled, used to the numerical data that offers data processor 14 through EFM demodulation process, deinterleaving in data processor 14.In addition, numerical data to store memory buffer 15 into as among the RAM, offers host computer as reproducing data by interface 16 through the correction process of scramble process and use ECC then.This just allows to reproduce the information that records medium 100.
Next step will be described in medium 100 execution information record and reproduce the accuracy of assessing swinging signal in the operation and this operation of operation of controlling optical recorder 1 according to assessment result.Fig. 3 illustrates the process flow diagram of this control.
When routine when the step 201 of insertion dish enters step 202, in this step 202, judge and answer the executive logging operation and reproduce any operation in the operation.At this, under the situation of recording operation, routine enters step 203, and under the situation of reproducing operation, routine enters step 214.
In step 203, execution parameter is measured, and uses measurement parameter to carry out assessment then.In other words, be the accuracy of assessment swinging signal, the crc error rates that 11 pairs of system control components are detected by atip decoder 19, the FMDT amount of jitter that obtains by jitter measurement parts 20 and carry out statistical treatment such as simple average or moving average by each evaluate parameter of SYNC phase error that phase error measurement component 21 obtains.Then, system control component 11 compares the statistical value separately of crc error rate, FMDT amount of jitter and the SYNC phase error of the atip signal that obtained with the range of set value separately that stores among the EEPROM 28.
Fig. 4 A illustrates the signal that produces according to swinging signal to 4D.Swinging signal shown in Fig. 4 A is decoded, and just, swinging signal is through the FM demodulation, thus the atip signal shown in acquisition Fig. 4 B.Atip signal is carried out digitizing, thereby obtain the FMDT signal shown in Fig. 4 C,, extract the FMCK signal shown in Fig. 4 D as clock then by in PLL, the FMDT signal being circulated (loop).The FMCK signal is used for Spindle Motor.The FMDT signal also carries out chatter (buffet) by the FMCK signal, thereby obtains atip signal.The FMDT shake is FMCK signal and the deviation of FMDT signal on time shaft, and it is the quarter-phase modulation, and has three kinds of pulse width 1T to 3T.At this, in jitter measurement, can measure all 1T to 3T.For example, can only measure 1T simply.
Fig. 5 illustrates as the ATIP-SYNC signal of ATIP synchronizing signal and as the relation between the FRAME-SYNC signal of record data frame synchronizing signal.About a frame of atip signal and a frame of record data (2352 byte), had 75 frames in one second.When record data are write down, atip signal frame and record data frame are carried out synchronous in executive logging.In other words, be under zero the situation, to carry out main axle servo in the phase error of the frame synchronizing signal of the synchronizing signal of ATIP and record data.Adopt CD-R and CD-RW standard, phase error always satisfies in 0 ± 2EFM frame (being 136 μ sec under the situation in standard speed) in any position on the medium.Phase error measurement component 21 Measurement Phase errors are to provide it to system control component 11.Thus, system control component 11 is carried out main axle servo according to the phase error measurement result, and the phase error measured value is carried out statistical treatment such as simple average or moving average.
System control component 11 according to predetermined decision condition, judges whether change record and reproduction speed according to the assessment result of above-mentioned three evaluate parameters.
In decision condition, can carry out following various modification: 1. have any to depart from the situation of range of set value in three assessed values; 2. in three assessed values two situations that depart from range of set value are arranged; And 3. three assessed values all depart from the situation of range of set value.
In step 204, judge and whether satisfy the rapid change condition.At this, when when above-mentioned steps 203 is judged change record and reproduction speed, routine enters step 205, and when judgement did not change record and reproduction speed, routine entered step 206.
In step 205, change record and reproduction speed.In other words, when evaluate parameter surpasses range of set value, reduce writing speed, and writing speed after the reduction is set as initial value.On the contrary, when evaluate parameter does not reach range of set value, improve writing speed, and writing speed after the raising is set as initial value.In this way, the processing of execution in step 201 to 205, thus make optical recorder 1 can become opening entry state before, just, can be to " ready " state of medium 100 execution information record.
In step 206, with the setting speed opening entry, and routine enters step 207.Whether in step 207, judging provides end of record address.At this, when end of record address is provided, stop record.When end of record address was not provided, routine entered step 208.
In step 208, during recording operation, carry out the processing identical, and routine enters step 209 with step 203.
In step 209, judge and whether satisfy the rapid change condition.At this, when judging change record and reproduction speed in step 208, routine enters step 210.When judgement did not change record and reproduction speed, routine turned back to step 207.
In step 210, interruption logging, perhaps at some interruption logging that can interruption logging, and flow process enters step 211.In step 211, judge whether exceed the speed setting scope.The speed setting scope represents to change according to the predefined writing speed of offset whether for example above-mentioned evaluate parameter, medium 100 allow to handle the characteristic of high speed operation and medium 100 upper and lower bound of scope.At this, when the speed after changing exceeds the speed setting scope, stop recording operation.In addition, when it did not exceed the speed setting scope, routine entered step 212.
In step 212, change writing speed, routine enters step 213 then.In routine 213, restart record with the speed after changing, and routine turns back to step 207.In other words, when evaluate parameter exceeded range of set value, interruption logging reduced writing speed then to restart record.On the contrary, when evaluate parameter did not reach range of set value, interruption logging improved writing speed then to restart record.
At this, point that can interruption logging for example is meant the data recording end point in the next grouping of the situation that adopts the grouped record method to write down.Have interruption logging and from be adjacent to position after interrupting restart to write down the optical recorder of this function can be after definite writing speed condition interruption logging immediately.
As the moment of restarting to write down, for example, exist and to finish the moment of reducing writing speed, store the record data of a plurality of fixed amounts in the impact damper 15 moment, perhaps begin the moment of set time in the past from stopping.
After changing writing speed, when determining that writing speed changes condition once more, interruption logging reduces or the raising writing speed, then to allow to restart record once more.Then, the change of duplicate record speed, thus finish record.
In addition, under the situation of medium 100 information reproductions, routine enters step 214 from step 202.In step 214,, use the measurement parameter execution parameter to measure and assessment as step 203.
In step 215, judge and whether satisfy the rapid change condition.At this, when not satisfying the rapid change condition, routine turns back to step 214.When satisfying the rapid change condition, routine enters step 216.
In step 216, judge whether exceed the speed setting scope.As the situation of the speed setting scope of above-mentioned writing speed, the speed setting scope represents that predefined reproduction speed changes the upper and lower bound of scope.At this, when the speed after changing exceeded the speed setting scope, routine turned back to step 214.In addition, when it did not exceed the speed setting scope, routine entered step 217.
In step 217, change the reproduction speed of under CLV or CAV condition, setting.In other words, when evaluate parameter exceeds range of set value, reduce reproduction speed, continue simultaneously to reproduce.On the contrary, when evaluate parameter does not reach range of set value, reduce reproduction speed.Then, the change of repetition speed is to finish reproduction.
As mentioned above, according to implementing optical recorder 1 of the present invention, in order to assess the accuracy of swinging signal, assess each evaluate parameter according to range of set value, as the phase error between the frame synchronizing signal of crc error rate, FMDT amount of jitter and the ATIP synchronizing signal and the record data of atip signal.When evaluate parameter departs from range of set value, change record and reproduction speed, thereby can improve the reproduction accuracy of swinging signal, can not be thereby prevent from medium 100 information reproductions and occurrence record mistake.
It is noted that the present invention is not limited only to top embodiment, and much less, can in the scope that does not break away from the object of the invention, add various modifications.
Optical recorder involved in the present invention can be applied to not only use that the CD-RW described in the embodiment is as the optical recorder of optical recording media in the above, and can also be applied to use along track record provides CD such as CD-R, DVD-R, DVD-RW, DVD+R, DVD+RW and the DVD-RAM of the swing that comprises timeline information and be different from the optical recording media of dish such as the optical recorder of light-card.
As above described in detail, according to optical recorder of the present invention, optical reproducing apparatus, recording medium recording method and recording medium reproducing method, it is stable to reproduce the address information that is included in the swing, and can carry out stable information record and reproduction to optical recording media.
Commercial Application
The present invention is used for optical recording media is carried out information recording/and reproduction, and advantageously suppresses to send out Give birth to from the error of swing recovery time axis information, thus recording and reconstruction information stably.

Claims (11)

1. optical recorder comprises:
The swinging signal production part is used for producing swinging signal according to the electric signal from light picker output;
Evaluation means is used to assess the accuracy by the swinging signal of described swinging signal production part generation;
Control assembly is used under the situation to the CD executive logging, when the swinging signal accuracy by described evaluation means assessment departs from preset range, allows to carry out the control of interruption logging operation; And
The jitter measurement parts are used to measure the amount of jitter of swinging signal,
Wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the swinging signal amount of jitter of being measured by described jitter measurement parts.
2. optical recorder as claimed in claim 1 wherein, adds error-detecging code in the swinging signal to, and the decoding parts use the error-detecging code error detection when the timeline information that produces from swinging signal is decoded; And wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the error rate of error-detecting.
3. optical recorder as claimed in claim 1, wherein, add the synchronizing signal that is used for carrying out frame synchronization to swinging signal, and the phase error measurement component is provided, be used to measure the phase error between the synchronizing signal of described synchronizing signal and record data with record data; And
Wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the phase error of being measured by described phase error measurement component.
4. optical recorder as claimed in claim 1,
Wherein, under the situation of executive logging, when judge that swinging signal accuracy by described evaluation means assessment is lower than preset range following in limited time, described control assembly carries out the interruption logging operation, reduce writing speed and restart the control of recording operation; And
When judging that the swinging signal accuracy is higher than going up in limited time of preset range, described control assembly carries out the interruption logging operation, improve writing speed and restart the control of recording operation.
5. optical recorder as claimed in claim 4, described device also comprises the jitter measurement parts, is used to measure the amount of jitter of swinging signal,
Wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the swinging signal amount of jitter of being measured by described jitter measurement parts.
6. optical recorder as claimed in claim 4, wherein, add the synchronizing signal that is used for carrying out frame synchronization to swinging signal, and the phase error measurement component is provided, be used to measure the phase error between the synchronizing signal of described synchronizing signal and record data with record data; And
Wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the phase error of being measured by described phase error measurement component.
7. optical reproducing apparatus comprises:
The swinging signal production part is used for producing swinging signal according to the electric signal from light picker output;
Evaluation means is used to assess the accuracy by the swinging signal of described swinging signal production part generation;
Control assembly is used for carrying out under the situation of optical disc replay, when the swinging signal accuracy by described evaluation means assessment departs from preset range, changes the reproduction speed of setting under CLV or CAV condition; And
The jitter measurement parts are used to measure the amount of jitter of swinging signal,
Wherein, described evaluation means is assessed the accuracy of described swinging signal at least according to the swinging signal amount of jitter of being measured by described jitter measurement parts.
8. optical reproducing apparatus as claimed in claim 7 wherein, adds error-detecging code in the swinging signal to; Wherein, the decoding parts use the error-detecging code error detection when the timeline information that produces from swinging signal is decoded, and wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the error rate of error-detecting.
9. optical reproducing apparatus as claimed in claim 7, wherein, add the synchronizing signal that is used for carrying out frame synchronization to swinging signal, and the phase error measurement component is provided, be used to measure the phase error between the synchronizing signal of described synchronizing signal and record data with record data; And
Wherein, described evaluation means is assessed the accuracy of swinging signal at least according to the phase error of being measured by described phase error measurement component.
10. a recording medium recording method comprises the steps:
Produce swinging signal according to electric signal from light picker output;
The accuracy of assessment swinging signal;
When the swinging signal accuracy of being assessed departs from preset range, interrupt recording operation to recording medium; And
Measure the amount of jitter of swinging signal,
Wherein, at least according to the amount of jitter of the swinging signal of measuring, assess the accuracy of swinging signal.
11. a recording medium reproducing method comprises the steps:
Produce swinging signal according to electric signal from light picker output;
The accuracy of assessment swinging signal;
When the swinging signal accuracy of being assessed departs from preset range, change the reproduction speed of under CLV or CAV condition, setting; And
Measure the amount of jitter of swinging signal,
Wherein, at least according to the amount of jitter of the swinging signal of measuring, assess the accuracy of swinging signal.
CNB02804116XA 2001-11-26 2002-11-21 Optical recording device, optical reproducing device, method for recording optical recording medium, and method for reproducing optical recording medium Expired - Fee Related CN1320545C (en)

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US20040066722A1 (en) 2004-04-08
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